Amino acid content in relation to growth of Helminthosporium maydis Nishikado and Miyake.

During the growth period of thirty days, altogether thirteen amino acids showed their presence and activity in the developing culture of Helminthosporium maydis Nishikado and Miyake. Initiation of growth by the 5th day coincided with the appearance of profuse amounts of dl-alanine and serine, and moderate amounts of valine, threonine, and aspartic acid. The thirteen amino acids, which appeared in full complement by the 15th day, were actively engaged in accelerating mycelial accumulation. Beyond this growth period, there was a decline in the amino acids.